* {
    padding: 0;
    margin: 0;
}
li {
    list-style: none;
}
body {
    height: 100vh;
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
}
.container {
    width: 600px;
    position: relative;
    overflow: hidden;
}
.lunbo {
    position: relative;
    width: 3000px;
    height: 225px;
    display: flex;
    transition: all 0.6s;
}
img {
    width: 600px;
    height: 225px;
}
.con {
    display: flex;
    justify-content: space-between;
    position: absolute;
    left: 50%;
    width: 70px;
    bottom: 5px;
    margin-left: -35px;
}
.con li {
    width: 10px;
    height: 10px;
    border: 1px solid #ccc;
    border-radius: 50%;
    background: #ccc;
}
.left,.right {
    position: absolute;
    width: 30px;
    height: 30px;
    top: 50%;
    margin-top: -15px;
    background: url(../img/icon_left.png);
    background-size:30px;
    cursor: pointer;
}
.right {
    right: 0;
    background: url(../img/icon_right.png);
    background-size: 30px;
}
.con .active {
    background: #fff;
}